45781188820 has 24 divisors (see below), whose sum is σ = 97220730600. Its totient is φ = 18106716672.

The previous prime is 45781188811. The next prime is 45781188821. The reversal of 45781188820 is 2888118754.

It can be written as a sum of positive squares in 4 ways, for example, as 2177902224 + 43603286596 = 46668^2 + 208814^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45781188821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12858105 + ... + 12861664.

It is an arithmetic number, because the mean of its divisors is an integer number (4050863775).

Almost surely, 2^45781188820 is an apocalyptic number.

It is an amenable number.

45781188820 is an abundant number, since it is smaller than the sum of its proper divisors (51439541780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45781188820 is a wasteful number, since it uses less digits than its factorization.

45781188820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25719867 (or 25719865 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 52.

The spelling of 45781188820 in words is "forty-five billion, seven hundred eighty-one million, one hundred eighty-eight thousand, eight hundred twenty".